Ellsberg is essentially saying that anybody should be able to steal state secrets and reveal them with no repercussions. So the list of all American agents working in foreign countries should be revealed to all even if it means the agents get imprisoned or killed.
That's basically what happened when American spy Aldrich Ames released info to the Russians thirty years ago.
And that is what will happen to current American operatives if scum like Ellsberg and Assange have their way.